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Demographic Changes and Neutral Interest Rates: Evidence from theWorld's Fastest-Aging Economy

Author

Listed:
  • Sangyup Choi

    (Yonsei University)

  • Hyunpyung Kim

    (University of Texas at Austin)

Abstract

This paper estimates Korea's long-run real neutral interest rate and quantifies the structural forces behind its decline since 1990. Using semiannual data for 12 advanced economies over 1990-2024, we estimate a cross-country panel state-space model that separates country-specific productivity and demographic trends from common global components. Korea's neutral rate falls from about 1.6% in 1990 to roughly 0.7% in 2024. The model attributes this decline mainly to slower trend productivity growth, the post-2014 reversal in the working-age population share, and spillovers from major advanced economies. Safe-asset market forces also contribute, but supply and demand effects partly offset each other. Counterfactual simulations suggest that removing global spillovers would raise the 2024 estimate by about 0.6 percentage points, while holding the working-age share at its 2014 level would raise it by about 0.5 percentage points. Conditional demographic scenarios imply continued downward pressure absent offsetting structural changes, highlighting implications for monetary policy space.

Suggested Citation

  • Sangyup Choi & Hyunpyung Kim, 2026. "Demographic Changes and Neutral Interest Rates: Evidence from theWorld's Fastest-Aging Economy," Working papers 2026rwp-292, Yonsei University, Yonsei Economics Research Institute.
    • Handle: RePEc:yon:wpaper:2026rwp-292
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    References listed on IDEAS

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    1. Papetti, Andrea, 2021. "Demographics and the natural real interest Rate: historical and projected paths for the euro area," Journal of Economic Dynamics and Control, Elsevier, vol. 132(C).
    2. James D. Hamilton & Ethan S. Harris & Jan Hatzius & Kenneth D. West, 2016. "The Equilibrium Real Funds Rate: Past, Present, and Future," IMF Economic Review, Palgrave Macmillan;International Monetary Fund, vol. 64(4), pages 660-707, November.
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    Keywords

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    JEL classification:

    • E43 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Interest Rates: Determination, Term Structure, and Effects
    • E47 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Forecasting and Simulation: Models and Applications
    • E58 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Central Banks and Their Policies
    • F15 - International Economics - - Trade - - - Economic Integration
    • F62 - International Economics - - Economic Impacts of Globalization - - - Macroeconomic Impacts

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